Bunch-building mechanism for spinning frames



March 30 1926. 1,578,911

J. NORTHROP BUNCH BUILDING MECHANISM FOR SPINNING FRAMES Filed Ju 26l9?5 ,5 Sheets-Sheet v witness.- I

March 30 1926. v 1,578,911

J. NORTHROP BUNCHBUILDING MECHANISM FOR SPINNING FRAMES Filed June 26,1926 '5 Sheets-Sheet 2 J NORTHROP BUNCH BUILDING MECHANISM FOR SPINNINGFRAMES Filed June 1925 5 Sheets-Sheet 5 Margh 30 1926.

witness:

J. NORTHROP BUNCH BUILDING MECHANISM FOR SPINNING FRAMES March 30 1926.

25 5 Sheets-Sheet Filed June l9 March 30 1926.

1,578,911 J. NORTHROP BUNCH B ILDING MECHANISM FOR SPINNING FRAMES 5Sheets-Sheet 5 Filed June .6, 1925 liwenfor:

Patented Mar. 30, 1926.

UNI'1ED,S"I'. \TES .rolus NOBTHROI, or nornnnnn, MASSACHUSETTS, AssIGNoRzro nornnnnn MANU PATENT OFFICE.

IAOTURING COMPANY, OF" MILE-RD, MASSACHUSETTS, AbGORPO'RA'I-ION OFMASSACHUSETTS.

' mmcn-nnrnnme mncnemsm r03 srmnme rams.

- Application filed June 26, 1925. Serial m. 39,682.

in the art to which it appertains to make and use the same.

The present lnventlon relates to an -1m provement in bunch buildingmechanisms for spinning frames.

In spinning filling for. use on weft replenishing 'feeler looms, it isdesirable to provide the bobbin with a small bunch near the butt of thebobbin, to be engaged by the feeler in order to secure the efficientoperation of the weft replenishing mechanismof the 100m. A need hastherefore been felt for a bunch building attachment adapted to beapplied to existing spinning frames, and particularly ring spinningframes of the Whitin type. To this end the invention consists in thebunch building mechanism hereinafter described and particularly definedin the claims.

In the accompanying drawings illustr'at ing the preferred form of theinvention,

Figs. 1, 2, 3, 4, 5, 6 and 7 show successive,

positions of the bunch building mechanism in operation forming a bunchon the bob.- bin; Fig. 8 -sh0ws the traverse lever and associated partsfor operating the ring frame to raise and lower it, with the bunchbuilder in the position which is assumes at" or near the beginning ofthe bunch building operation; Fig. 9 is an enlarged view of part of themechanism illustrated in Fig.8; Fig.-

10 is a front view of-the bunch building mechanism; Figs. 11 and 12illustrate,'respectively, a plan and front view of the bunch builder armtappet; Fig. 13 shows in plan parts of the bunchbuilder mechanism; Fig.14 is a sectional elevation taken on the line 1414, Fig. 9; Fig. 15 is afront elevation of a portion of the Whitin ring spinning frame,illustrating in general the ring traverse mechanism as provided with thebunch building mechanism of the present invention; and Fig. 16illustrates six sectional elevations of the bobbln butt showing thebunch in sixsuccessive forms, A, B, C, D, E and F. y

The illustrated embodiment of theinven tlonisdescribed as follows:Referring to Fig. 15, the spindle rail 1 carries the spindles upon whichthe bobbins 2 are, placed, and the ring rail 3 is su ported on the post4.

In the complete mac me there are a num ,ber of such posts for supportingthe ring.

rail, which are connected together and operate simultaneously. The ringrail posts 4 are connected by the bell crank lever 5, connected by meansof'a chain 6 with the chain .stud 7 of the builder motion. The spinningframe is the Whitin ring frame.

The builder motion comprises the traverse lever 10,, pivotally mountedat 11 upon a stationary part of the machine, provided with thecounter-weight 12 in the usual manner. The traverse lever carries'a camroll 13, which is adapted to engage the traverse cam 14, mounted on theshaft 15, and rotated at a suitable rate of speed by gearing from thedrive shaft of the splnning frame. I

The traverse cam is provided with surfaces,

as shown, more especially in Figs. 1 and 8,

which oscillate the traverse lever to de ress it and to permit it torise by means 0 the counter-weight on the lever 5 holding the roll 13against the face of the cam. Thisimparts the oscillating movements tothe traverse lever, which is connected by the chain 6 to the lever 5,which operates to raise and lower the ring rail 3. This traverse leveris provided with-a slot 16, which receives the segmental rack '17. Thisrack is a se ment of a worm wheel which is engaged by t e worm 18carried on the shaft 20, up-

on the front end of which is mounted the ratchet wheel 21. This ratchetwheel is turned by oscillations of the pawl'lever 22, pivotally mountedon the shaft 20, carrying a spring pressed pawl 23, see Fig. 10. Thispawl lever 22 is actuated by means of a rod 24, which is reciprocated inthe usual manner. A- holding pawl 25 is mounted on the bracket arm 26,and operates'to engage'the' ratchet wheel 21 and hold it from backwardimovement. The front end of the worm shaft 20 is provided with a squarehole to receive a crank for re-winding the mechanism to startingposition, aswill be hereinafter described.

The mechanism thus far described is a i mechanism of the Whitin ringframe, and istappet 47, and swings" the bunch builder familiartothose'skilled in the art and needs no further description.

The bunch builder mechanism. is mounted on the traverse lever 10, andconsists of mechanism for reciprocating the ring rail at the beginningof the operation of the frame to form four layers of yarn about one-.half an inch long on the bobbin adjacent to the butt thereof. This bunchbuilding mechanism comprises a plate 30, which constitutes a frame forthe mechanism. This plate 30 is bolted to the side of the traverse lever10, in the position shown in Fig. 14. It rests against the surfaces ofthe rack guide 31 and bearing support 32 of the traverse lever. A clampplate 33 is applied to the opposite side of the traverse arm, as shownin Fig. 14, and a -bolt 34, passing through holes in the plates 32 and33, secures the plate in place on the traverse lever. This plate 30 atits upper end carries a stud 35, upon which the bunch builder arm 36 ispivoted. A spring 37 normally tends to move the bunch builder arm 36 tothe left, as viewed in Fig. 1. A pawl arm 38, pivotally mounted at 40 onthe lower end of the bunch builder arm 36, is-provided on its end with apawl 41 which is a member adapted to engage the hook 42, secured to orformed-integral with the tumbler 43. The pawl 41, at a certain point inthe operation of the bunch builder mechanism, turns the tumbler 43 fromthe position shown in Fig. 'Zto that shown in Fig. 1. The tumbler 43 istriangular in shape, being pivoted at one corner on the stud 44,supported from the plate 30. This tumbler carries a roll 45 at. a secondcorner, and is provided'with a born 46 at its third corner. The bunchbuilder arm 36 isprovided on its extreme lower end with a tappet 47. One.end 48 of the tappet is secured by means of the bolt 50 to the bunchbuilder arm 36. Theother end 51 of the tap-pet extends into the path ofmotion of the rack 17. When the rack is in its extreme forward position,its end strikes the end 51 of the tappet 47, and swings the bunchbuilder arm 36 outwardly into the psition shown in Fig. 1. This positionthe bunch builder arm retains during the formation of the bunch on thebobbin.

The operation of the mechanism is as follows: After dofling the spinningframe, and donning it with empty bobbins, the operative inserts hiscrank in the end of the shaft 20, throws the pawl 25 off of the ratchetwheel 21, and, holding the pawl 23 off of the ratchet wheel with hisleft hand, turns the crank to the right, thereby turning the worm 18,and moving the segmental rack forwardfrom the position shown in Fig. 9

to and beyond the position shown in Fig. 8. Just, before the end of itsforward movement, the rack 17 strikes the end 51 of the arm 36 to theright, as viewed in Fig. 1, with the result that the parts assume thepositions illustrated in that figure, the roll 45 and horn 46 of thetumbler 43 being ready to engagev the surface of the traverse cam 1 4,and tohold the traverse lever in the position shown in Fig. 1, as soonas the traverse. lever 10 is permitted by the operative to rise,whereupon, through the connections described, it supports the ring railin proper position to begin the formation of the bunch. The pawl 25 isthrown on to the ratchet wheel 21, and the frame is started up. As thetraverse cam 14 rotates in the direc-v tion of the arrow 52, Fig. 1, thetumbler 43 controls the position of the traverse lever, and the buildingof the bunch begins. During the first traverse of the ring rail it movesupwardly a sufficient distance to lay upon the bobbin the yarn indicatedin form A, Fig. 16. By this time the horn 46 will reach the depression53 between two lobes of the traverse cam, as shown in Fig. 2', andcontinued motion of the traverse cam will cause the tumbler to turn upon'its'stud 44 to the position shown in Fig. 3, at which time the ringrail will be depressed, and a second layer of yarn will be wound on thebobbin, as shownin form B, Fig. 16. As the traverse cam continues itsrotation, the tumbler 43 will move from theposition shown in Fig. 3 tothe position shown in Fig. 4, at which time the traverse lever cam roll13 will engage the surface of the cam. During this movement of the partsfrom. the position shown in Fig. 3 to the position shown in Fig. 4, athird layer of yarn will be laid upon the bobbin, and the bobbin willassume the condition illustrated in form C', Fig. '16. Continued motionof the traverse cam 14 willnow depress the traverse lever, only a partof a lobe of the cam 14 being employed for this purpose, and a. fourthlayer of yarn will be laid on the bobbin, which will 'then assume thecondition illustrated in form D, Fig. 16. By this time the traverse camand the other parts will have reached the position shown in Fig. 5, andthe tumbler 43 will have been turned to its new psition. With continuedoperation.

'in form E, Fig. 16. The second layer will bring the bobbin to theposition shown in form F, Fig. 16, at which time the two layers of longtraverse on the bobbin will have been completed.

Ill

As the bobbin is now built up, the seg-- mental rack 17 is Withdrawnfrom behind the tappet 47, and the bunch builder arm is permitted toswing from the position shown in Fig. 6 to the position shown in Fig. 7.A considerable number of reciprocations of the transverse mechanism willbe 5 and depresses the ring rail, doffs the bob-- bins and dons it withnew ones. Then upon completion of winding back the rack, the

. tumbler is again swung into the position shown in Fig.1, and the framemay be started up again as before.

7 It is 'to be observed that the operation of re-setting the ring railtraverse mechanism automatically throws thebunch builder mechanism intooperative position, and that the bunch builder mechanism thenautomatically performs its bunch building operation,

at the end of which it automatically ceases suchoperation, and thenormal formation of the bobbin continues thereafter. The mechanismrequires no manipulation by the 0perative at any time.

The bunch builder mechanism operates to control the ring rail at thebeginning of the operation of the frame to form four layers of yarnabout one-half an inch long onthe bobbin adjacent to the butt thereof,when the frame is started up with the parts in the position shown inFig. 1. -A useful feature of the invention resides in the fact that theoperative may, if he desires to reduce the size of the bunch, start upthe frame with the pawl in the position shown in Fig. 2, in which casethere would be but three small layers of yarn on the bobbin, and thiswould make a much smaller bunch, which, in some instances, might bepreferred.

One feature of advantage which arises from the present invention is thefact that after the bunch building operation is completed, the regularroll 13 of the traverse lever 10 takes control of the rail without anyjar or jerk, the mechanism operating gradually to permit the traverselever to rise until the roll 13 engages the traverse cam. In some bunchbuilders heretofore used, at the termination of the operation of thebunch builder, the traverse lever is permitted to move suddenly in orderto bring the regular control into operation, and this has sometimesresulted in sudden motion of the ring rail, which has sometimes causedthe breaking of ends.

Having thus described the invention, what is claimed is:

1. Bunch building mechanism for spinning frames having means comprisinga lobed traverse cam for controlling the traverse of the winding on thebobbin and means for varying the position of the traverse including arack, having, in combination, a tumbler, means for supporting it in 7position to engage the traverse cam, and means for turning the tumblerfrom inoperative to operative position comprising a part adapted to beactuated by the rack, the movement of the rack. in the direction tostart the spinning of bobbins operating to turn the tumbler intoengagement with the traverse cam.

from the rack to turn the tumbler into. position in engagement with thetraverse arm.

3. Bunch building mechanism for spin-' ning frames having meanscomprising a lobed traverse cam for controlling the traverse of thewinding on the bobbin and means for varying the position of the traverseincluding a rack, having, in combination, a frame adapted to be securedto the cop building motion, a swing lever having a portion attachedthereto adapted to be engaged by the rack and provided with. a pawl, atumbler supported on' the cop builder motion of triangular form providedwith a hook, the pawl being adapted to engage the hook toward the end ofthe cop building operation, and to turn the tumbler cam when the rack isreturned to starting position to bring two corners of the triangle intoengagement with the surface of the traverse cam, the lobes of which actto turn the tumbler during two complete forward and back movments of thecopbuilding motion a short distance suflicient to build a bunch near thebutt of the bobbin, and thereafter to throw the tumbler into inoperativeposition for the reminder of the cop building operation.

4. Bunch building mechanism for spin ning frames having means comprisinga lobed traverse cam for controlling the traverse of the winding on thebobbin and means for varying the position of the traverse including arack, having, in combination, a tumbler supported on the traverse I ningframes having means comprising a lobed traverse cam for controlling thetraverse of the winding on the bobbin and means for varying the positionof the traverse including a raek, having, in combina tion, a tumbler ofirregular outline adapted to engage the traverse cam, means for movingthe tumbler into operative position controlled by the rack, said tumblerbeing so shaped as to cause the cop building motion to build a bunch onthe bobbin, and to throw the tumbler out of operation when the bunch iscompleted.

6; Bunch building mechanism for spinning frames having means comprisinga lobed traverse cam for controlling the traverse of the winding on thebobbin and means for varying the position of the traverse including arack, having, in combination, a tumbler of irregular outline adapted,

to engage the traverse cam, means for moving the tumbler into operativeposition controlled by the rack, said tumbler being'so shaped as tocause the cop building motion to build a bunch on the bobbin and then tothrow, the tumbler out of operation Without.

shock or jar when the bunch is completed.

7. Bunch building operation for spinning frames having means comprisinga lobed traverse cam, a traverse lever having a part adapted to engagethe traverse canu'the cam and lever normally controlling the traverse ofthe winding on the bobbin, and means for varying the position of thetraverse including a rack having, in combination, an auxiliary traversecam engaging device, and

means for moving it into operative positioncontroll'ed by the rack, saidauxiliary trav JONAS NORTHROP.

